I can tell you about the current project, but this is irrelevant. I test different ideas. What matters is: it's b2c and I want my potential users to prove they are interested by making a payment. It could be escrow or any kind of refundable payment. I'd prefer to accept payments with google pay or apple pay, but any easy payment methods at ok. Bank transfer is not easy at all.

Payments amounts vary from $10 to $200.

Are you targeting for subscription plans (or) is it a one time payment?

Which payment integrations have you tried so far?

Bank transfers for small amounts have too much friction at this point.

If it's a simple file like a pdf, audio or video file or even an executable file then I would recommend to go for Gumroad. Wouldn't recommend if it's an App that has to be put on an App store or Play Store.

I need at least the one time payment option. Having subscription would be absolutely terrific.

I've tried bunch of shitty local service providers last time. Awful experience, takes months to get approved.

I can't use Gumroad. They offer bank transfers only for US. The rest of the world suppose to use Paypal. And Ukraine is that part of the "rest of the world" that doesn't allow to accept payments from Paypal.