I have a used 52mm AEM TRU Boost gauge/controller. Pretty nifty gauge, has buttons for 2 preset boost levels and is a digital gauge. I only have the black gauge face. It has a crack along the top, came out of a friends totaled srt4, but functions 100%. The only thing you'll need is some hose for the vacuum, he cut it to get it out.
$215
Info and install instructions:
AEM TRU-BOOST Gauge / Boost Controller - Monitor and Control Boost 30-4350
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I also have a BRAND NEW Innovate MTX-L wideband gauge/data logging software. It is the fastest reading digital wideband, you can customize the warnings for hi/low AFR's and a bunch of other cool little things. Comes with everything you would get new, except for the o2 bung. Comes with 52mm gauge, o2 sensor, o2 sensor extension, data logging cable, data logging software, white face and silver bezel thing.
$160
MTX-L Wideband O2 Digital Air/fuel Ratio Gauge

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Buy both for $350 shipped or trades for Zeitronix zt-2 wideband + LCD display, and I could use the boost sensor too.

I'm located in Canton, GA. Meeting around Woodstock and Kennesaw wouldn't be a problem. I can ship too (paypal only) and honestly if you live on the east side of ATL, shippings gonna be cheaper than driving over here. Lol.
I'm not on here that often, you can PM me or reply here, but it may be a while before I see it. email is faster: [email protected]