If you are wanting to spend less than $200 get the food saver model V3420 . Cheapest box store is wally world or sams for the unit.
online is the cheapest.
If you can spend a bit more ,look at some of the professional series at cabellas.
There is a few places on line to get the bags cheaper than any box store.
If you got to www.smokingmeatforums.com
there have been some good member reviews of different vac sealers and there are reviews on the different after market bags and sites they are available from.