Brilliant - you really can't beat Islabikes if you're prepared to stump up the money to start with - my rule of thumb is that you'll get at least 70% of your money back whether you buy new or s/h.
I have invested in a "private fleet" of Islabikes for our 4 grandchildren that range from nearly 8 down to 7 months ... a Rothan balance bike, 2 off 16" wheel, 1 off 20" wheel, 1 off 24" wheel ... and for the future growth 1 off 26" wheel and 1 off 700c (the latter 2 being small frames)
The lease concept is a great business model, although it's already been copied by a couple of other manufacturers of children's bikes.
Rob