There are a few receivers for very cheap on the overseas market boasting the MSD 7816 chipset. Looks like possibly 550mhz and claims to to 16apsk and 32apsk. I found some specs on it:
([Only registered and activated users can see links. ])
Main Feature

l Compliant with DVB-S/S2 standard

l 5000 or more channels memory space

l HDMI 1.3 transmitter output interface with embedded or external HDCP key

l User friendly and easy-to-use menu system

l 7 Days EPG

l Teletext and subtitle output through OSD

l Parental Lock function

l PVR function supported

l Advanced Time-shift function

l Supporting pictures with JPEG,BMP,PNG,zoom fuction supported

l Supporting music files with MP3、AAC、M4A

l Capable to playing picture and music at the same time

l Supporting movie files with MPEG1/MPEG2/MPEG4/H264/M-JPEG /AVI/MPG/MP4/TS/TRP/TP/MOV/MKV/VOB/DAT ect

l DiSEqC1.0/1.1/1.2/1.3

l Unicable LNB supported

l The OTA upgrade supported(optional)

l Software upgrade by USB2.0 interface

Hardware Feature

CPU: Mstar MSD7816(MIPS34K CPU)

Speed: 550M

Flash: 4MByte

DDRII Memory: 64MByte

Connection: HDMI1.3, SPIDIF, AV6(YPbPr, CVBS) or 1Scart,LNB IN,USB2.0

Front panel:3Key(Power,CH+,CH-),4 bit 7-segment LED array,IR receiver

Video/Audio processing

l ISO/IEC 13818-2 MPEG-2 MP@ML,up to 1080p@30fps

l ISO/IEC 14496-2 MPEG-4 SP and ASP,up to 1080p@30fps

l ITU-T H.264,ISO/IEC 14496-10( MP&[email protected]), up to 1080p@30fps

l Hardware JPEG integrated,scaling down ratios:1/2,1/4,1/8

l Audio decoder compliant with MPEG-1,MPEG-2(Layer I/II),MP3,WMA, AAC-LC

l Dolby/DD+ support optional

l Simultaneous supporting HE-AAC decoding and transcoding to AC-3

l Stereo audio description decoding supported

l RA8-LBR decoding supported

Tuner

Input Frequency: 950 to 2150 MHz

Signal Input Level: -65 to 25 dBm

Input Impedance: 75Ω

LNB Power: 13.5±1V/18.5V±1V,max 350mA

Channel Decoding

Waveform


QPSK,8PSK,16APSK,32APSK,compliant with DVB-S/S2 spec

Maximum channel bit rate


168Mbps

Maximum symbol rates


45MSps for QPSK,8PSK,16APSK, 37MSps for 32APSK

Roll-off


0.35,0.25,0.2