There has not been any MLS activity on Del Mar Glen since your friends purchase. I did a wider search on the mapcode they live in which is 1188A7.
The most recent data point is 12330 Del Mar Oaks but that home is smaller. It is a 3/2.5 2189 sq ft, and it listed for 123 days. The listing expired last week and was 820-845 at expiration. The agent relisted again and it is active on the MLS at 819k.
Last year 8/2006 a 5/3 bath model 2649 sq ft on 3985 Cypress Del Mar listed and was on the MLS for 157 days. That listing was cancelled on 2/7/07 and when they cancelled they were at 800-835k. That home then sold on 3/9/07 for 795k.
There are 3 other data points but they are all brand new homes built in 2006 on Carmel Park Dr. To be honest I do not think they are accurate to comp against your friends home.
I would have to do some more research to give a definitive opinion but by the looks of it, unless there are some very eye catching upgrades or something that really sets this home apart from others, it will be challenging for your friends to get what they paid for it. Just my opinion and just trying to be honest.
SD Realtor
vrud – I will look at more comps tomorrow to see if I can find more encouraging news.