Just adds another 10 years to the kit, and almost certainly had a hard life with a wedding photographer. If 2nd hand, Id rather buy something somebody kept on the shelf as a show pony.
Not sure how much fill flash you use, but apparantly the extra 2 stops of TTL are usefull with faster film. Porta 800, -1 stop needs ISO 1600..
I have found a mint- millenium with CFE and A12 for $2700. Think thats the go. KEH, has a mint 503CW for $1599 and CFE on sale for $1099 then Id still need a back.