Mauser .22 sporter rifles

I have browsed around on the web quite a bit, but don't see much mention of pre-WWII Mauser .22 sporter rifles in the U.S. Over here in South Africa they are fairly often seen at gun shops are go for around $390. Does anyone know roughly what they are worth in the U.S. and why the U.S. web is so silent on the matter?

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