From my own experience buying online like blue Nile and at these Asian stores in oc where I live makes white difference in price and re sell value. I bought a round 1.62 ideal cut, I color, vs1, excellent exclent medium blue fluorescence or strong I forgot for $11k and when I needed to sell it no one offered me more $6k, but with my 1.17, IF, D color, hearts and arrow I bought 9 yrs ago and paid $9k for it, when I took it in they wanted for $15k, so diamond prices have gone up but it rely depends on the quality of the diamonds for re sell value. Also, buying from these places they will always buy back your diamond less 10%. I found that to be esxtremly helpful.