you can still get them from HK for around $350
the m40 xb original and best version is no longer made from what I understand.
I actualy had one about 8 years ago and sold it on for about £200
I bought my XB without mag for 40€!
The M40A1 is pretty rare ( it was produced in limited number I think it was 1000 pcs) and depending on the condition and upgrades can go $500.
The SP's are pretty old and they lack of upgrade/spare parts so if something breaks you should make your own replacement part.
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