Foodsaver is a wonderful invention, I bought mine nearly new (no packaging) off Ebay, I bought a nearly new old style electric countertop grill (not the clamshell grills, but the old 1970s style grill that is no longer made) there too. Sometimes nearly new electric cooking appliances will pop up on Ebay. Using small electric appliances to cook is better than using a whole huge oven.
As for Foodsaver, the basic idea has been around since the 70s, back then it was called Seal-A-Meal and was made under the brand name Dazey. The Seal-A-Meal didn't work all that great, but the patents passed through several hands over the years and eventually the waffle style bag was invented to suck ALL the air out (the Seal-A-Meal wasn't 100% so it wasn't as effective) and the basic appliance was improved on. Using the cut to fit rolls is far better than using the precut bags. The problem with the Foodsaver bags are that they are extremely expensive and the roll never lasts as long as you think it will. Foodsaver is best for meats IMO.
As for potatoes, there are varieties of potatoes that you can just put some in a cool, dry, dark place like a shed and they will last until the next planting, my grandfather used Red Pontiac potatoes. Russets are terrible, they need to be constantly refrigerated or else they sprout. I once read that the russet was created to remedy the famous potato blight in Ireland, every potato they tried to stop the blight couldn't, so some food scientist had to invent a completely new potato, but the potato was very sensitive and had to be babied, but it was the only way to stop the blight.