Wow...50 bucks for the Philosopher's Stone, Silver to Gold for five bucks, a Wishing Machine (fully assembled!) for only $150.00! Plans for a G-String Amplifier, only seven bucks!! What? It's a "G-Strain" Amplifier? Damn. Never mind.

What generous inventors, to sell the secrets of the Universe as Blue Light Specials instead of using them to become fabulously wealthy!

I was going to order the Time Machine plans for twenty bucks, but my future self came in the door and told me it was a complete ripoff.

(Actually, a few of these, like the air-cushion Hoverboard, not only look feasible, but kind of fun...)

This site goes right into my "File of Weirdness" Thanks for the link!