0.01 g

$8.99 + free shipping

[URL unfurl="true"]http://www.ebay.com/itm/Digital-Scale-100g-x-0-01g-Jewelry-Gold-Silver-Coin-Gram-/130702079725?forcev4exp=true&forceRpt=true[/URL]

Check coin collecting websites.  I bought mine for $24 and it is amazing.  It only weights to hundreths but that is fine for me.

**edit:  If you have $20 bucks you should pay the extra and get the gemeni mg scales

[URL unfurl="true"]http://www.amazon.com/American-Weigh-Gemini-20-Portable-Milligram/dp/B0012TDNAM/ref=sr_1_1?ie=UTF8&qid=1349131548&sr=8-1&keywords=Gemini-20[/URL]

These are apparently recommended by various nexians. A worthwhile investment if you ask me!  Great for DMT and RC's and such...