I am new to automags so I appologize in advance.

I realize that classic RTs have air fed through the rail and do not have interchangable parts like ADG other platforms (unless mods are done). I have been seeing on ebay a lot of RT classics selling in the $120-150 range? This make an RT classic $20-50 more then a standard classic mag. Is this correct? Is that a good price?

Thanks.