In short, yes. Probably a double whammy, increased demand over lock down, which certainly saw Peco's OO track products selling out. And only two manufacturers with N gauge ranges of any size, and both experiencing difficulties with getting product from China even before Covid. Dapol had announced several of their planned N products 'on hold', and Farish was affected by the general slow down of all Bachmann's output due to closure of a key factory by the government, both occurring well before Covid, which has created further limitations.
And systematic price rises in Chinese made product cover all scales, starting in earnest from about 2015, and the main dealers in s/h have promptly raised prices of even the older s/h to match. Frankly, you have to watch like a hawk for the moments when dealers 'get it wrong' or decide on price reductions to move some s/h stock that is clogging their shelves. What I look for in OO are offers on s/h models that have faults or problems that are known and readily repaired; the same is likely to apply in other scales, but I know nothing of N. (Annoyingly the best models which are robust and reliable rarely appear...)
And systematic price rises in Chinese made product cover all scales, starting in earnest from about 2015, and the main dealers in s/h have promptly raised prices of even the older s/h to match. Frankly, you have to watch like a hawk for the moments when dealers 'get it wrong' or decide on price reductions to move some s/h stock that is clogging their shelves. What I look for in OO are offers on s/h models that have faults or problems that are known and readily repaired; the same is likely to apply in other scales, but I know nothing of N. (Annoyingly the best models which are robust and reliable rarely appear...)