Hey, Frugal is my middle name, too.
The pool looks stained here and there, but I'll check today for cracks.
The spa looks like it has a couple of thin cracks on the side walls.
I'm with Yippee on this one... sounds like a good chance for them to sell you something. The pool does not need to be re-plastered after 8 years just because it's "old." I work with pools that still have their original plaster after 10+ years, and most of them look just fine (depending on how it was cared for). Now cracks can be concerning...