I sold an SP-15 with mods (but these seldom if ever help the used price) for $1900 a couple of years ago, so your SP-14 should go for less and the SP-9 for still less. Not much help, I hope you get more from others.
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Thanks guys, appreciate the feedback. Yes, they are both in perfect condition, just trying to make up my mind which one to keep and which to sell. I'm leaning towards keeping the SP14, although the differences are quite minor between the two. I took pictures of both with my digital camera today, I'll sell one of them shortly. Appreciate you taking the time, Jeff