I did a search but didn't find any current threads on this. It seems that RAM prices have been going up. In the past I have always ordered RAM from OWC and without any issues. However, Crucial RAM is cheaper at this time, though OWC says there is no issue running their RAM in addition to the stock RAM, whereas Crucial doesn't guarantee compatibility, rather saying it is best to take out the stock RAM and only run theirs. This is for a 2013 iMac with 8GB standard, looking to add 16GB (8GBx2 kit) for a total of 24GB. The Crucial price is $163.99 plus tax, free shipping - about $171. The OWC price was $189.99 no tax, free shipping but went up today to $199.99 I know a lot of users here use both. Any recommendations.