A budget is a budget, so I totally get it. Obvious things first, the correct utility. So a gas or electric as they cant be converted. Look for something under 7 years old, from brands like GE or Whirlpool. Sensor Dry is a nice feature. Also, take out the lint screen try to look inside to make sure that it’s not packed with lint from years of use in the drum area where it meets the casing. If you can get the serial # call the manufacturer to ask if it has any service history, the last thing you want is someone else’s headache.