I have two BNIB silver-top plossls for sale with plastic caps. They came with my Celestron Wide Field 80 Spotting Scope (ST80). These don't have Celestron logo but are equivalent to the Celestron Plossls, which sell for $45 each.
10mm Plossl $18
20mm Plossl $18
or both for $35
add $2 for first class postage, $4 for priority mail (CONUS)
I accept Paypal (preferred), money order, or personal check (Astromart green star rating or better)
Thanks for looking!