There isnt anything wrong with Home Depot. Its how you use and
maintain the equipment. As for Ryobi, its a cheaper line.... Take a
look at the pump and see who makes it. If its some off shot make, i'd
stay away. Finding parts might be an issue.
You can always go on the net and do a search or two on the pump brand.

The better ones at HD are the Honda GX series motors and generally have
a decent pump on them. (I prefer little giant pumps myself)