If just want a digital scale to weigh eggs, get one on Amazon or Ebay for much less than $30... it's easy enough to simply print up the sizing charge, and cross reference the egg weight...
You can get a 500g or 1000g digital scale for under $10 delivered... I have both of these bellow for misc reasons and they both work well...
http://www.amazon.com/American-Weig...qid=1443204421&sr=8-2&keywords=American+Weigh
This one is only up to 100g but it measures to 100th of gram, so real accurate and 100g is plenty for most chicken eggs...
http://www.amazon.com/American-Weig...qid=1443204421&sr=8-1&keywords=American+Weigh
I simply cut the bottom off an egg carton to make a little nest for the egg so it doesn't roll around and weigh...
You can get a 500g or 1000g digital scale for under $10 delivered... I have both of these bellow for misc reasons and they both work well...
http://www.amazon.com/American-Weig...qid=1443204421&sr=8-2&keywords=American+Weigh
This one is only up to 100g but it measures to 100th of gram, so real accurate and 100g is plenty for most chicken eggs...
http://www.amazon.com/American-Weig...qid=1443204421&sr=8-1&keywords=American+Weigh
I simply cut the bottom off an egg carton to make a little nest for the egg so it doesn't roll around and weigh...