Wanted
All numbers are per Koll 2009. Conditions need to be very good or better. Box is not an absolute must.
When variation requested is listed as "any", less expensive versions are preferred.
Locomotives
Brand Scale Number Variation Description
Märklin H0 3055 2 NS, electric, gray/yellow, number 1212, NS railroad logo, top nose gray, divided vents
Märklin H0 3161 82701 NS, electric, blue, number 1202, MEA logo on both sides
Märklin H0 3608 1 NS, railcar, red/yellow, PTT mP 3000, number 3004, like 3388.1 but digital 
Märklin H0 3951 (3051.5) 5 NS, electric, blue, number 1223, kit, divided vents, flat number boards
Märklin H0 3951 (3051.6) 6 Same as 3951 (3051.5) but with pantographs 9 (25069) instead of pantographs 8 (7218)
Märklin H0 SEWH800 2 NS, electric, turquoise, number 1101, no "Germany" lettering, no traction tires
Märklin H0 SEWH800 3 NS, electric, turquoise, number 1101, no "Germany" lettering, with traction tires
Passenger Cars
Brand Scale Number Variation Description
Märklin H0 352 E LMS 1 dining car, red, stamped LMS, for British market
Märklin H0 353 E LMS 1 sleeping car, red, stamped LMS, for British market
Freight Cars
Brand Scale Number Variation Description
Märklin H0 4575 2 US gondola, yellow/brown, Dixie Line, the inside is painted brown instead of gray
Märklin H0 4577 1 US caboose, green, Penn Central
Märklin H0 4578 5 US caboose, red, number 395
Märklin H0 4777 1 US caboose, ATSF, red
Märklin H0 4678 85701 Märklin Museum car 1985, ocra
Märklin H0 4864 1 US tank car with Baker's Chocolate lettering
Märklin H0 4865 1 US flat car with Seaboard truck
Märklin H0 45704 1 US caboose, Milwaukee Road, orange
Märklin H0 45711 1 US box car, Milwaukee Road, brown/yellow
Sets
Brand Scale Number Variation Description
Märklin H0 37605 1 VT 11.5
Misc.
Brand Scale Number Variation Description
Märklin OO 405G 1 Wooden figures (10)
Märklin H0 0224 (plastic) 2 Plastic sitting figures (9)
Märklin H0 0226 (Guß) 1 Metal sitting figures (10)
Paper
Brand Scale Number Variation Description
Märklin none Issue 2 2006 Märklin Magazin and Märklin Insider in Dutch