Hi LDM; 30 bucks!!! I sell mine for $10. for a pair of 12" pieces! Either I'm being cheated, or they are hosing people! I use a special slitting saw setup thats knocks out one every 17 seconds!! The biggest expense seems to be the exhorbitant costs of K&S 1/8 x 1/4 brass tubing. Also, the the grey Plastruct i-beam 3/16 x 3/8 is a perfect fit in my track. I just finished sending a dozen sets to Mark OMeara, a Scale Masters and Top Gun participant. If you have any specific questions, I'll try to answer them. Sincerely; Lee Robinson [email protected] See track at www.robinairerc.20m.com Click on photos.