Original copies of "Natty Dread Christmas" by The Iron Phoenix on The Thing have been known to fetch over $200. The Jamaican release actually features the legendary Heptones, who adopted the Iron Phoenix name for this 1976 record (and a few other sides) because their own name was falling out of favor with record buyers who saw the Heptones as "too soft" at a time when Reggae music was becoming edgier and more overtly political. In 2010, the British reissue label Observer repressed "Natty Dread Christmas". This was back in the spring, so the supply is drying up. Google for vendors (mostly in the UK) or hit up eBay, but here's a few who still seem to have copies in stock--JahWaggy, Sounds of the Universe, DubVendor; it'll run you between $6 and $8 (American), plus postage.
Earlier this year, "Christmastime In Cowtown" showed up in my routine check of the holiday listings at CD Baby. I ordered it immediately and was not at all disappointed. The 1999 release featured stellar Blues performed by Bobby Counts and others from the Fort Worth, Texas area. I'd expected, perhaps, a country blues disc but, for the most part, this is straight ahead Blues blues. Better yet, further exploration has revealed that the on-line ordering mechanism at the original web site appears to be functioning again. I've only just placed an order for Volumes 2 and 3, so obviously I can't tell you anything further. I can't even guarantee there are any CDs at the end of that rainbow, yet. But I will say that, for fans of Christmas Blues, Volume 1 is a very nice listen indeed. [Postscript: CDs--Volumes 2 & 3 have arrived!]