Strong Buy
If you own a clean copy of Mew #53 from Evolutions, this is a card to get graded. Raw copies trade around $34.34 while PSA 10s sell for about $6650.00, a 5248% Return on Grading. Returns like this tend to attract sellers, so the raw price may not stay this low.
Among the 46 cards in Evolutions with PSA 10 sale data, Mew ranks 1st for Return on Grading and 2nd by PSA 10 price. Of the 13 Rare Holo cards with PSA 10 sales, it is 1st for Return on Grading. The median PSA 10 in this set sells for $192.82. 22 of the 46 clear a 100% Return on Grading.