Is this possible...?

Hey people,

I was browsing craigslist.com for stuff and came across this...

"I can mod your Xbox AND install your hard drive for only $50! I mod your Xbox WITHOUT THE USE OF A MODCHIP! What I do is FLASH TSOP! No longer will you have to worry about your modchip staying aligned! Play backup games on disc OR on your hard drive! Watch DVDs without the DVD Dongle Kit! All those video and audio clips you download online, you can put them on your xbox and watch them on your TV! It doesn't matter how old your x-box is! I can mod it WITHOUT a chip! If you're interested, just send me an email! Unleash your Xbox!"

... is this on the up-and-up? Modding "WITHOUT THE USE OF A MODCHIP"? I thought about it only because Fry's has refurbished XBOXs for cheap right now and thought it might be my chance.

Thank you much.