It just seems like there isnt enough players in FH4 to keep the AH topped up with a selection of rare cars.
In FH3 the rare cars were always up for grabs even if the cheap ones were snapped up by the elite and priced up to max bid - regardless of price the rare cars were always there and you had a choice to buy one right away or wait for a cheap one and do your best to snipe it first. FH3 is still very alive and the AH still has rare cars for sale in abundance.
FH4 is completely different, there is hardly ever a car for sale if its rare regardless of price.
I think the shonky credit resellers are not collecting credits in the AH to resell this time around because it is too slow to make money if they can only buy one rare car a day if they are lucky.
If you look at ebay those credit sellers are doing something else to add credits or cars to your account which will get you banned rather than milking the AH and transferring the CR to your account by buying out your cars.
Honestly those who exploit the game for cash will do whatever is easier & in FH4 waiting in the AH to buy a cheap car with a macro is not going to be time / cost effective for them.
I have spent a lot of time in FH4 AH and only ever seen approx 10 rare cars for sale, none of them were 20m, I managed to snipe several.
Most of those were apparently clones which is what the resellers on ebay are selling by means of adding them to your account.
I think the devs should hit up ebay and learn the names of the people involved and take action and clean up the mess and then give serious painters the option to sell paints separately and give us all the same power in the AH or the problem will never go away.