Jim,
the downsides are no trailer and no hard top. The hardtop would price $10-15K higher, similarly for a newer trailer.
That said, that is a LOT of boat for $25K. If I were buying it, I'd have it surveyed, look in the bilge, etc, but if that came out well, I'd jump on this boat. My buddy has a 1999 228 that was in my driveway next to mine recently (he got my hard top). You had to look really closely to see any difference from the 1999 hull to the 2020 hull. Grady makes a good boat, someone is gonna get a sweet deal on your 208.
If anything, I think you have it priced low. Those were $100K out the door with a trailer and hard top in 2020. Knock off $30K for HT & trailer, you are at $70K. Knock off another 50% for the age and you are at $35K. I think $25K is a steal if it passes the survey. Though if that Etec is noisy, that would slow me down, I love how quiet my 250 is at idle, you almost don't know it is on.
Advertise down south, more money around LA & San Diego.
Good luck!