Cool.  I think 300 would be a very good price.  Im currently building a rider Aero and it will probably end up costing me £400, hopefully less.
I dont understand why Aero Reflex's are not more in demand.  I think they are fab bikes and, the fact that there was a warehouse full of boxed frames which, after 28ish years, are suddenly found and on the market - WOW!!  Imagine if that happened with Haro Freestylers..!!  Especially when you consider that these brand new, boxed, 28 year old frames typically sell for £100..
Hopefully this will sell.  It deserves to..
Paul