Are the ones from 1998, serials in the 16000 range and with some of the

initial improvements, worth anything close to this?

According to the database, the "2003" unit with a 9 element antenna was
purchased through ebay in 2003. Since it had the 9 element antenna, I'm
guessing it was very old and was probably not worth $300. This doesn't
mean one couldn't get $300 for it on ebay, but you'd have to be lucky.

On the other hand, a unit that was sold new in 1998 might be worth $300
if it's in good shape. A unit built at this time should have the eleven
element antenna, improved "jog shuttle", etc.

Ooops, the van is outside. I'm off to camp now.

Steve