Only thing, if I bought one, I'd want to preserve it and use my 20 clunkers instead!
I think the mulch function was considered the replacement of the smart flap and not considered worth adding to the price.
I had saved a smart flap off a mower I wrecked but disposed of it. May have been worth saving.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!