If you're just starting out collecting Lugers, buy the reference books first. They seem expensive, but you'll save their cost in the first bad deal you avoid.
For what a mismatched Luger priced at $1375 costs you, you could have a correctly priced mismatched Luger (worth $1000) AND the
most detailed Luger study that has been published.
There is a lot of information in the FAQ I mentioned earlier, but much more detailed information in the books.
So, go to Luger University first, then buy Lugers. Your experience may vary.
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.