All old, worn or broken DV cartridges can be traded in on a brand new, latest model one* . You can even upgrade if you wish.
The discount varies according to model and here is the outline:
ALL FIGURES ARE APPROXIMATE
Brand New DV-10X series. Less 20%
(equivalent models include: 20A, 20A2, 20B, 20B2, 10Xseries)
Brand New DV-20X2 series. Less 20%
(equivalent models include: “ruby”, 23R, 23RS, 100R, 20Xseries, Karat Diamond, 100D, 17D2 and older)
DV-17D3 is now discontinued and replaced by the all new 17DX. Trade in is based on 15% of the new 17DX price and in fact
the discount amount is higher than it was for the 17D3. (Karat Nova is equivalent to 17D3)
Brand New DV-XX2 series. Less 20%
(equivalent models include: XX1, XX2)
Factory rebuild service is available at 35% discount. Typically takes 5-6 weeks.
Brand New DV-17DX. Less 20% and 15%
(trade in 17DX for 20% discount, trade in old 17D3 for 15% discount)
Brand New DV Te Kaitora Rua. Less 25% and 15%
(trade in TK Rua for 25% discount, trade in original Te Kaitora for 15% discount)
Factory rebuild service is available at 40% discount. Typically takes 5-6 weeks.
Brand New DRT XV-1 series. Less 25%
Factory rebuild service is available at 40% discount. Typically takes 5-6 weeks.
*there is one exception, the ancient DV-50X is not able to be traded in, it was sold at a lower price with no trade in available.