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> What we currently do on SellApp, is block purchases coming from VPN's/proxies

That's basically a non-starter for me as I need to give all potential users a good UX.

We give the customers a heads up to contact the seller when they get blocked, so it'll be as easy as telling them that they need to disable their VPN/proxy in order to make the purchase.

Although, it'd make more sense if we tell them that and save you the time to reply to a few customer support tickets. Will add it to our roadmap :)

> that they need to disable their VPN/proxy in order to make the purchase.

That's also a non-starter because that defeats the purpose of a VPN.

Agreed. There are proxies which defeat detectors. If i were a fraudster i'd use those. So all you're doing is losing real customers.

Can you name some?

There are so called "residential proxies" that use a IP from some normal consumer ISP connection, not some datacenter IP. However there are services that can detect such residentials too, e.g. https://focsec.com/

How do you detect VPN or proxies? Are you using 3rd party services such as IP2Location or Maxmind?

Hey, we do indeed use Maxmind for our VPN/proxy detection. So far the experience has been pretty good.

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