I had all the old cox's in my collection: space bug and the hop up kit, red, white, blue and yellow space bug Jr's, strato bug (red tank, yellow tank does exists but good luck to find one) numerous thermal hoppers with single and twin carbs and the cage mounts, yellow and silver body RR-1's, the space hopper (had a few) and then the 09 medallian and TD, and all the TD 15 variants, the 010, 020, 049, 051 and 09 tds as well as all the medallians, and the 15 sportsmans and one lowly olympic.
I collected most over a few years time, and none are really rare IMO but the STrato bug... it took me three years of constant searching.
Three years ago, at the toledo show an older MECA member was taking some cox stuff out of a box and I saw it - the strato bug! I ran over and didnt even look at the marked price, said "i'll take it!" and then saw it was only $40.
Ahh, memories. SOme day I will start collecting again. WHen I have lots of $$ to burn that is
AJC