John
I don't think anyone on here is going to sell you a suppresser. It's too much trouble to buy one from a Class 3 dealer, much less selling to an individual. It's taking about 4-6 months to get the permit from ATF right now. Double that from an individual. If you're serious about getting a suppresser for a 22 RF just go to a dealer, if you can get by the ATF investigation. If not, just forget it. Nobody here is stupid enough to sell a controlled item to you under the table.
Now, if you're legit, go to a class 3 dealer and look at the YHM Mite. You can buy one for $200 and it's a very good 22 can. $200 more for the transfer tax and you're ready to go. After that get a Ruger 10/22 FS for less than $300. It is threaded for a flash suppressed so the can will screw right on. So, for less than $700 you can be up and running.