Jerry Moos and I have recently been on a Simplex Buying Binge. In fact at times we've been bidding fast and furiously against each other. Therefore, i will hazard a guess at ebay market prices for the items that you seek. Prices do not include shipping.
Simplex prestige red-label rear mech, used, $5 (same as list price in 1973) Simplex prestige red-label rear mech, NOS, $10-$20
Simplex front delrin parallelogram mech, $5 (rusty), $10(used), $20(NOS) Simplex delrin shifters, $0 Simplex criterium shifters, $10 (NOS on ebay NOW, 15 of them new-in-bag)
The prestige line is highly undesirable, because the shifters snap and as the rear mechs age they loose stiffness and get sloppy. Here are some pirate applications for prestige parts :
prestige rear derailleur - source of jockey wheels for high-end Simplex SLJ mechs. not a good source for cable hangers.
prestige shifters - source of barrel adjusters for raleigh rear centerpull cable stop on 1970's nottingham bikes.
prestige shifters - can be turned around and stripped of levers to make a half-decent downtube cable stop (seen on a bike in paris, france, march 2004)
- Don Gillies
San Diego, CA