Sony officially announced (via Amateur Photographer) that “Sony plans to discontinue its full-frameAlpha 850 DSLR this summer and has already stopped making its Alpha 290 and 390 DSLRs, less than a year since they were announced.” and “Sony plans to halt production of the Alpha 850 (pictured) in July or August because the 24.6MP camera is too similar in specification and price to the flagship Alpha 900 model. ”
You can still get those cameras in some stores:
A850 direct search links at Amazon, B&H, Adorama, J&R, eBay.
A390 direct search links at Amazon, B&H, Adorama, J&R, eBay.
A290 direct search links atAmazon, B&H, Adorama, J&R, eBay.