Pair of Brevet S.G.D.G - Made in France - Red Label (both rims)
AVA label on 1 rim, missing on other
36 spokes, 20mm if I am measuring correctly
Campagnolo skewer on front, back is missing skewer
Condition is good, miniscuale rust spots.
Rims sidewalls are smooth.
Glue on rim surface of one and other one still has tire on it

The rims themselves? Almost nothing. AVA were kind of soft, and were budget rims. Unless they're NOS, figure $20 bucks in most markets.

If they're full wheels, with Campagnolo hubs, then maybe $80-150 for the complete wheels, or $100-200 for just the hubs on eBay. (Yes, the hubs alone will probably sell for more than the complete wheelset. Stupid, but that's how it is - almost no one wants tubulars.)

Welcome to the forum, jackerman. It sounds to me like you might have complete wheels, not just the rims. If this is the case, value will be impacted, so let us know if they are wheels or just rims. If wheels, report the make of the hubs and anything else, such as the freewheel, that might be included. Also, knowing where you live will be helpful in determining value.

At our local Co-op we took possession of a large quantity of old stuff from a store that recently closed. Some of the inventory was pre-war.

This included many tubular wheelsets. We sold the wheelsets for $75 if they had Campagnolo Record high-flange hubs. Most of these had old Mavic or AVA rims. The lesser wheels, with hubs such as Campagnolo Tipo, Normandy, Atom, Gipiemme, Miche etc. hubs, we sold in bulk to a collector at $20 for the lot.

Glad to get rid of this stuff; we are drowning in stuff. It is all gone.