I think the reason 14" Fuchs are the most worthless of all is because of the VW guys. There are two reasons not to put them on a Beetle. First, any tire you put on them will screw up your gearing on the highway. Second, if you have a BJ car and you lower with dropped spindles, they don't fit. For these reasons, they will never be worth anything. If they fit Beetles, I think they would be very commonplace. Who would buy a fake when 14" Fuchs are cheaper?
They are, however, a great choice for a bay window Bus. When you bolt the adaptors to them, they have the exact same dimensions as the stock wheel, guaranteeing the fit.
It used to be that you had to pay over $2k to get the 16x8 or 9s. Now I see the odd pair offered below $1k. 16x7s will always be cheap since they are so common. Even though they can fit the rear of a Beetle, I think VW guys don't want them because VW guys seem to like to use truck tires, and there aren't any truck tires in 16" that you would use on a Bug. (like a 205/70/16)
Anyone can ask a sky high price like $1500 for a set of deep 6s. IMO that means nothing regarding the value. It's what they sell for that determines the value.
I think cookie cutters suffer the same fate as EMPI 8s in the VW world. They are just not liked. I think they are a great choice if you can't afford Fuchs, and they come in the perfect sizes, 6 & 7x15. Although, they are heavier than you think. 4½, 5½, 6s and early deep 7s, and 14" Fuchs are lighter.