I wouldn't be so sure, speaking as a tinplate collector . 100 each of four versions makes for 400 total, which is a pretty typical production run by ETS for ACE or WJ Vintage, runs are rarely larger, quite often smaller, and they cover the current three rail market nicely without causing serious rarity or exclusivity.
The modern collector of tinplate wants either original, or a decent 'semi-scale' (think Dublo writ large) model, as evidenced by the products of ACE, WJ Vintage, Darstaed (previously) etc. These are neither and so are unlikely to cut it at this price, which is more than ACE were asking for their range of semi-scale 0-4-4Ts, and about the same as they wanted for a Large Prairie.
Of course, I may be underestimating those outside of the tinplate three-rail world who want one simply because of its special edition status, but thinking back to previous 'out-of-gauge' specials - remember Bachmann's pewter Puffing Billy? - I don't think these will have much appeal outside of those already in this area of modelling/collecting.