I dont think you can tell the difference in something vac sealed in a $50 machine as opposed to a $500 or more??? They all do the same but some have more bling than others.
My Sboly F88 holds 11" rolls, has a built in cutter, and will vac seal something with liquid in it! It also does jars, but you have to purchase the lids. I never used that anyway even when I had my other unit. Its quick and quiet. I especially like the price tag! If it ever breaks I could buy several and never reach a huge price tag! Time will tell!
Lever - - can't debate that. When a $50 unit works, nobody knows the difference.
All I can say about buying a more heavy-duty unit is that they tend to seal more reliably, possibly with more vacuum, and more quickly.
At the tail end of the link Fordtech86 linked, I posted the first sealer we bought.
Seems it was $60 or so. I really wanted to see if we would use a sealer or not. Found we really did use it. Probably too much for light-duty unit.
Worked great for a while, but then tended to fail to seal about 25% of the bags. Sometimes those seals failed in the freezer. Seal was a single line, and not very wide.
I can't get parts for the $60 sealer. I can get parts for the commercial Weston sealer. Bet you can get parts for many Foodsaver sealers, but just guessing.