Gary, mine was about $25 non-bid... and I think that was a screaming deal. By comparison, the guy who makes new ones charges $58 + $5 shipping. Available in different tooth counts, eBay says 31 units sold. NOS ones usually list for more than that.
https://www.ebay.com/itm/133292853667
SHORT BED 4-DOOR DIESEL: 1986 F350 4x4 under construction-- 7.3 IDIT ZF5+GVOD
STRAIGHT SIX 4X4: 1981 F150 2wd to 4x4-- 300 I6 close ratio diesel T19, hydroboost brakes, Saginaw steering
BIG F: 1995 F-Superduty under construction— converting to 6.9L IDI diesel ZF5+DNE2