I'd first recommend getting a better camera
. Or ask a friend to take some pics with his phone.
The horn's plastic, yes, but that's not necessarily a bad thing. Selmer USA and Bundy have been around forever (OK, since the 19-teens). You can't stick around that long if your horns suck.
* Serial numbers for "harmony" clarinets -- i.e. any clarinet pitch other than Bb soprano -- are usually screwed up and the best recommendation is to call the manufacturer. However, it looks like you bought the horn "new." While it's always possible the horn was "unused" and had been sitting on a shelf for 50 years, it's probably from the 1990s. Contact Conn-Selmer if you want to be very sure.
* It's a Bb bass clarinet with keyed range to low Eb. I think you knew that
.
* I can't really tell anything about the condition because the pics are so poor. Condition is the #1 thing that will determine value. If you're looking for
replacement value, for insurance or something, just look online for a new horn.
A new Selmer USA 1430 bass is $1869 US (plastic).
I just searched for completed auctions on eBay and found a horn with a serial number not far from yours.
It sold for $455. Here's another, also with a close serial number, that
sold for $550.