I buy the cheapest and if it doesn't start fairly easy after the winter I go but another one
this is decent advice. At the least you could get some money by taking your broken mower to one of those mower fix it shops. If it's just not running they can get it back up and running and re sell it while you go and buy another one.
Another option is getting a small commercial walk behind.Their carburetor designs are far superior to throw away mowers and really don't have the clogged jet problem the cheaper units have. I have me a used commercial walk behind I bought off of craigslist for a hunned-fiddy dolla and it has a 16hp. Kawasaki commercial motor on it.