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<p>[QUOTE=&quot;Conder101, post: 126876, member: 66&quot;]The ONLY way to properly evaluate and compare the different services is to send the same group of coins to EACH service MULTIPLE times&nbsp; That way each service gives their opiniion on the exact same coin.&nbsp; Any comparison of what company A says about this coin against what company B says about THAT coin is totally meaningless.</p><p><br /></p><p>But if you could say</p><p><br /></p><p>Coin 1</p><p>Comp A 62, 58, 64, NG, 63</p><p>Comp B 63, 63, 63, 63, 63</p><p>Comp C 63, 63, 62, 63, 62</p><p>Comp D 67, 67, 67, 67, 67</p><p>Comp E 63, 63, 64, 63, 62</p><p><br /></p><p>Then you could START to be able to make some judgements.</p><p><br /></p><p>Coin is most likely a 63</p><p>Comp A is very inconsistant and grades all over the map.</p><p>Comp B seems to be both consistant and accurate</p><p>Comp C Seems to be pretty consistant and accurate, possibly slightly conservative</p><p>Comp D is consistant but probably overgrades</p><p>Comp E is pretty consistant and accurate not overly liberal or conservative</p><p><br /></p><p>And you do the same thing for a group of various coins.&nbsp; Classic and modern MS, Circ and Proof etc.</p><p><br /></p><p>The more coins you use and the more times each service sees each coin the moe accurate your conclusions will be.</p><p><br /></p><p>In order to keep the services from noticing that they are being tested you would not send the same coins in the same groups to each service (ither send them in small groups and swap the coins around between the groups each time you send them in.&nbsp; Or mix them in with other coins that are being submitted and not part of the testing.)&nbsp; Do not send them in using the same names and addresses.</p><p><br /></p><p>I figured that at a minnimum, to have any accuracy it would take a group of 20 coins, submitted at least ten times to each of the services&nbsp; So if you wanted to compare the top seven companies&nbsp; You are talking some 1,400 submission.&nbsp; At $15 per coin and another $15 in shipping fees per submitted group (For max anon each 20 coin submission should be broken into two groups)&nbsp; Your total cost for the survey would be $23,100.</p><p><br /></p><p>Now remember that is the MINNIMUM you would need for any kind of accuracy.&nbsp; And for each additional company you want to add to the comparison the price inceases by $3,300.[/QUOTE]</p><p><br /></p>

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