Free: Contests & Raffles.
With a budget of 500 I'd suggest the vacmaster vp112. It's a chamber sealer so you can literally vacuum seal a bag of water. Simple to use and the bags are a lot cheaper. Cost probably 1/3 rd what the food saver bags cost. I love mine the only down side is its almost the size of a microwave and weighs over 50 lbs.
How do the seal times compare between a Foodsaver type vacuum sealer and a chamber sealer? (I am not familiar with chamber sealers at all). I have a Foodsaver that I have always had good results with. But I will be in the market for a new unit in the near future.