and you don't have the anniversary headphones. what's your point?
That seems unlikely. Even if they had a K703 or whatever name it probably would have a premium as it would be a newer model like these. The HD650 sounds quite different but has higher resale value since there is a used market for the HD650 and is very popular. I did lose some money but not a large amount when I bought and eventually sold the HD650.
Also where is this HD800 and K702/65 coming from? They sound different (although closer than say a LCD2 and HD800) and completely different price range. Also the HD800 was a game changer and is end game for many and scales higher than any other dynamic headphone I've heard. If anything the K702 Anniversary would be closer to a HE6 in terms of signature. They are also different price ranges and the HE6 scales much higher but I still find these enjoyable. I'm still mad at myself for not realizing that these had a 3 pin XLR and not 4 for the connector but that's my fault.