$10 BJ can be found during the day...even on Saturday and Sunday until about 4 PM (once most football games are over) in the high-end properties (Wynn, Caesars, Bellagio, etc) but after that you'll be hard pressed to find anything below $25. You can still find multiple $10 tables at night at Bally's/Paris/MGM/etc that will have a good flow of people without too much of a wait to get a seat.

As far as payouts, a 6 deck game is almost always going to pay 3:2 regardless of the limit. The games paying 6:5 are single deck games and they might offer lower limits because not as many people want to play them. Personally, I have a fondness for the 3rd base seat at a full (and it MUST have 4 or 5 players) single deck table.