Axis bring our new foil designs extremely frequently and as a result previous excellent foils wings only recently released get over looked.
A good example is the ART pros and currently in particular the 1051.
For DW and just fun on flat water these are currently a bargain on SB forsale section.
Another example is the HPS which was the all time favourite only to be swamped and forgotten by new foil wings. The HPS dropped in value so much I bought them again. Turns out a good investment as their prices have now almost doubled.
In some cases, the ART pro 1051 is now listed at a lower price than some HPSs.
I expect the same will happen as excellent Axis foils drop in price they will become popular again and see a price increase.
I am unaware of any real dud or even close to dud Axis foils and I've had many.