often find them for $79-$84 at train shows.

Google is your friend;

(https://www.modeltrainstuff.com/intermountain-ho-40055-33-all-brass-insulated-wheelsets-100-bulk-pack/?ne_ppc_id=1079742151&gclid=EAIaIQobChMI3vW5jIrn4wIVkICfCh1PrwMkEAQYASABEgKs2vD_BwE). 

    You might also think about if you want to use code .88 if you are doing a mass conversion. 

-- 
Jon Miller
For me time stopped in 1941
Digitrax  Chief/Zephyr systems, JMRI User
SPROG User
NMRA Life member #2623
Member SFRH&MS