okra- the fender is a very average amp. I think for 280 out the door, if its in good shape and not too old, would be fine to pay for it, though I would never consider buying one new.
I actually considered buying one for my 410ce for the same purpose a while back and found some better options (again, this is in the price range of the new, which runs about 430 or so as you said)
At 280 bucks (more like 260 really if you consider what other amps would be with tax) there really is nothing that i can think of that would beat that...as anything even CLOSE to that price from a big maker would be the crate CA30, or the fender acoustasoic 30...
Ive never played an ultrasound as DavidE suggests, but i have heard excellent things about them. First quality music supply stocks them
www.fqms.com
If your purposes are just for home use to be loud ( i love doing this) then there really is no need to spend any more than that...the fender tone was just a little too electricky for me...too Fenderesque and not enough my guitar in the sound.
If you are willing to go up to the 3-400 dollar range, I would recommend the Marshall AS50R and the Carvin AG100D
Additionally, you seem open to the idea of a used amp- do a search on eBay, you can find some deals in your price range on stuff so you wont feel constricted just because you think the fender is the only one you can get a deal on
Make sure you do seperate searches for acoustic amplifier and acoustic amp, people sometimes dont list with both amplifier and amp in the title so youll get two different lists of the same types of items
(just a little eBay trick us regular ebayers discover along the way)
Best of luck!