I bought an 04 limited SSB last August with 5600 miles on it, 1 owner, garage kept etc for $13,000. It is 4 years older than what you are looking at but with less miles and not sure even with used car prices rising that $18,800 is the sweet spot. However, the color is rare, it has low miles, and appears to be in pretty good shape. It has some wheel rash and the headlights might be a little foggy but other than that, I can't pick up much from the pictures that would lead me to be concerned visually.

Bottom line, if you like the car, "your" price point is what's most important. I too would go equipped with comparative vehicles found on the internet with their pricing so when you go to the dealer you have some leverage to bring it down some.

Just FYI
Bluebook retail is $21,500
NADA trade in is $16,500 and Retail is $19,700
Do your research on comparables and on edmunds TMV and see what you come up with. Seems to me somewhere in the $17,000 plus range might be pretty good from a dealer.
Good luck.