You list something on Facebook Marketplace, Gumtree, or eBay. Within minutes, strangers are texting your personal mobile number. The sale goes through — or doesn't — and those strangers keep your number forever.
Most people don't think about this until something goes wrong. Here's why it's worth thinking about before that.
The problem with using your real number on listings
When you put your mobile number on a marketplace listing, you're not just handing it to one person. You're handing it to everyone who responds — and on a busy listing, that can be dozens of people.
Unlike a conversation in the platform's own messaging system, a text goes directly to your personal number. There's no middleman. The person has your number as a permanent contact in their phone, regardless of how the sale went.
The consequences range from mildly annoying to genuinely unsettling:
- Harassment after a failed sale — a buyer who didn't get the item, or felt you were too slow to respond, now has your direct number and can contact you any time.
- Scam texts — a number associated with a marketplace listing is a known target for scammers who send fake "I'm interested, please click this link" messages weeks after the sale.
- Unsolicited calls months later — people who bought from you before may call out of the blue about something entirely unrelated. Or people who didn't buy from you and are hoping the item is still available.
- Your number in data broker lists — numbers shared publicly, even briefly, can end up in marketing databases that are hard to get out of.
Real scenarios where this becomes a problem
The persistent buyer
You sell a sofa. Three months later, the person texts asking if you have any other furniture. Then again at Christmas. You don't know them. You can't easily make it stop without blocking them, and blocking doesn't prevent a new number.
The sale that went badly
A buyer claims something was faulty. The argument ends, but they have your number. So do their friends, who they've decided to share it with. You start getting threatening messages you can't trace back to anyone.
The scam follow-up
Two weeks after a Gumtree listing, you get a text: "Hi, saw your ad, is this still available? Here's my address, can you deliver?" The link asks you to enter bank details to "confirm delivery." This is a known scam that targets people who've recently had public listings.
The location problem
Your number is on a listing. Someone cross-references it with other platforms — LinkedIn, an old forum post, a company website — and can now link your phone number to your full name and employer. For a private sale, that's more exposure than you intended.
Why people still do it anyway
Most sellers use their real number because it's the path of least resistance. The platforms encourage it, buyers expect it, and it feels safer than giving out your home address (which is true — but that's a low bar).
The real reason is that there hasn't been a convenient alternative that works like a normal UK mobile number. VoIP numbers and online SMS services often don't work on UK marketplaces, get flagged as suspicious, or require the buyer to use a separate app.
A genuine UK virtual number — one that looks and behaves exactly like a normal 07 mobile — solves this without friction on either side.
What to use instead
A virtual number works exactly like a real mobile number. Buyers text it, you receive the message in your email. To them, it's indistinguishable from any other UK mobile number. To you, it's completely separate from your personal line.
When the sale is done — or if someone starts being difficult — the number is simply not your real number. You're not exposed. If things escalate, you can report and block without it affecting your personal contact details in any way.
It works for calls too. If a buyer calls your Privify number, it goes to voicemail automatically — you get an audio file emailed to you. You decide if and when to call back, from your real number, on your terms.
Other places this applies
The same logic applies anywhere you're putting a contact number in front of strangers:
- Airbnb and short-let listings — guests, potential guests, and the occasional odd enquiry all get your number if you list it.
- Tradespeople on Checkatrade, Rated People, MyBuilder — your number is on a public directory, visible to anyone searching.
- Local community groups and noticeboards — neighbourhood Facebook groups, local WhatsApp boards, Nextdoor listings.
- Job adverts — if you're a small business advertising directly, candidates who don't get the role still have your number.
- Car sales — AutoTrader, eBay Motors, local listings. A car is a big purchase; buyers will text to negotiate, then keep texting.
In all of these cases, a virtual number gives you the same functionality — real responses from real people — without permanently handing out your personal contact details.
A practical approach
The simplest setup: get a Privify number, use it as your "public" contact number for anything marketplace or listing-related. Your real number stays for people who actually know you.
All messages to your Privify number land in your email — so you don't miss anything, there's nothing extra to check, and it all works alongside your normal phone without any changes to how you use it.
Keep your real number private
Get a genuine UK number for listings, marketplaces, and one-off contacts. Every text forwarded to your email.
Get your Privify number →