Sounds like my story.
My first score was a pair of Uni-solar 64watt units, with a 16 amp CC and (2) Trojan T-125 batteries for $700 off of craigslist. Not a 'spectacular' deal, but good enough. I figured it was a fair price for a beginner set. They guy said he bought the set back in '99 for his 'bugout buggy'. Ran them for about 8 months, then took them off the RV when he sold it, and stored them in the garage ever since.
(128 watts, 240AH reserve)
After that I found the HF 45 watt kits. Debated for a while then decided to take the plunge. Bought 2 at $159 each.
(218 watts)
Then I saw a Craigslist ad (I told you it was EVIL!) for a 50 watt panel for $100. I snapped it up before I realized it was a 48volt unit. No matter... it's a brand new BPsolar panel... I can always unload it for at LEAST what I paid.....if I don't use it for a remote well pump.
(still 218 watts, 240AH reserve)
At the same time I found another ad for 6 volt UPS AGM batteries . 200 AH reserve. $35 each. 12 available..........I bought 8!
(218 watts, 800 AH reserve. Not mixing the battery types)
Now these two 80 watt Kyocera panels for $150.
(378 watts, 800AH reserve......and desperately looking for a bigger CC!)
I do feel a bit guilty at times, but I figure what he doesn't know, won't hurt him! >=)
At the rate I'm going I'll have a full KW+ of solar before I even have my land!