I got mine from Sam's Club (V2480) Item#770628. Admittedly, this a top-of-the-line job and its expensive at $118. However, it is a 'kit' and includes a jar sealer, three canisters, buncha bags,etc.
If you dont want to get that deep into it, try to find a model that includes these key features (key in my opinion, anyway)
1. one-touch (you dont hold the button during the whole process)
2. accessory hose (allows using canisters/mason jars/casserole-marinator)
3. vacuum only button (runs the pump w/o heating the sealer~ for canister operations)
The Sams unit has the following additional features which are all great, but not as essential:
4. seal-only button (lets you seal the bag w/o running the pump~great when making bags)
5. internal bag storage/dispensing
6. bag cutter
7. variable speed
8. variable vacuum level setting (dry food/ moist food)
9. manual overide on sealer (you can make it heat longer, say if the bag is wet and giving you trouble)
10. Cover lock (you don't have to hold the cover down while sealing as on the base models)
11. on-board hose storage.
Hope this helps,
Ricky
(nufsed)