Hey hey just a slip of the fingers, figure of speech or whatever... seems all the info I get on the yellow varieties, are described as "wild types," I guess in relation to their biogeography in Malaysia, or maybe being unimproved there as well.
Orange ones though! We are seriously rambutan challenged over here.
Anyways, whenever I buy them in south C. America, they go almost blackish in 2-3 days after buying. I think its best to buy a pound or two every few days, unless you're a gorger. Probably cold storage, fungicides, wax, or some other goodies Harry.