I’ll give it to you easy before all the dumb ratings come rolling in.
Paying for a map is not a good idea, especially a sum as low as $20. Think about how much work goes into a map, hundreds of hours if it’s a decent one, even if you payed them minimum wage it would be loads more than $20.
Secondly you need to post map requests in the subforum here; http://www.facepunch.com/forums/254-Requests
You also need to give specifics on the map when posting a request. What style/environment do you want it to be set in, what kind of buildings, stores, how many houses etc ( since this is an RP map you want. )
It’s a shame nobody ever learns that paying for a map is not a good idea since the kind of people who make these threads never lurk beforehand, but I can’t say I don’t blame you, and sadly this will keep happening.