I've used the 1700 for years - they make perfectly good kit, just not as 'polished' as Icom. You can snag that unit in the UK for under £160 from a dealer, so make sure it's a dealer you're buying from on Ebay.
IMHO I'd avoid used, unless it was unfitted and unprogrammed. That said, I had to change an MMSI with SH recently, and it was a cost free, DIY exercise. It can only be done once per unit tho!
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