I'am thinking of getting a 4dtv receiver for my 10 foot bud. I see that 922s are going for 400.00 on ebay thats to high for my buget right now. the 920s are quite a bit less. I see that the 920 can't get scpc . can someone tell me what this is and is it important? does it mean I won't get some channels? Also is there any way to tell if the bat is still ok when buying off ebay? If it powers on does this mean anything? Thanks