i also have had a mixed experience with Cameo.
1st time using them & unsure whether id try them again
the live internet auction itself was highly enjoyable mainly because the auctioneer was coughing his guts up for most of the night! i had my computer linked up to the tv & with the live feed coming thru my speakers even the missus was laughing & not complaing about missing Eastenders or some other crap soap! Communication, post auction, was efficient & friendly.
I managed to pick up Alien(folded) & Metropolis(rolled) quads for £20 each, which after commision etc was added was still not that bad. Unfortunately, the experience was sullied by their P&P.
i paid £12 for P&P - thinking they would post the items seperately - logical i thought but no they sent them together in a tube made out of glorified toilet paper the folded poster was just wrapped around the rolled,neither had any protection from the tube. Somehow neither poster was completely destroyed - the Metropolis was a bit roughed up (described as "mint" by Cameo) But Alien was still in excellent condition.
Cannot understand why, as a auction house, they cannot do a bit of research & package the posters properly. i expect ebayers to be next to useless,even when you provide instructions, but i expect an element of professionalism from auction houses. i feel sorry for the guy that bought the Metropolis US Reissue 1 sheet for close to £400 & it turns up destroyed!