The dv888’s sell for $55 with special splash, $45 regular/solid. Once sold, they go for $25/30 on the after-market sale. I have a dv888, I’m not a super huge fan of it. I’m not saying it’s bad, I’m just saying it’s not an ideal fit for me. I am glad I have one, and I will play it from time to time to challenge myself. It has purpose in my collection, even if just as reference yoyo to compare other things with.
I won’t comment on the Avant Gard. I haven’t played it and it’s not an item of interest to me.
The “assurances” of the other end of the deal sound a bit dubious to me. I was gonna say “fulla crap” but I’m just trying to be nice. Oh wait, I kinda goofed up there.
My gut instincts say “no, this isn’t a fair trade”. But, hey, what do I know? You can snag another Ava for $120(perhaps). It’s ultimately your call.