I'd say look for a good sale price on pretty much any Foodsaver model and go for it. Unless you need any of the higher end features, all of them will suck and seal the same bags.
I have a FoodSaver 3430-something I bought on sale for bagging my home-grown hops, and then started using it for actual food. Works great, not much to it. If a different model had been on sale I'd have gotten that one instead...
Cheers!