Thank youPeople have mentioned an estimate like that, as a percentage. However, it really does depend on the word. A domain such as "car dot com" is of course worth millions, but for "car dot net"...I'd be hesitant to pin a "definite" 5 to 10%, due to it still being a powerful domain (even if under COM). IMO
Thanks.com will always sell more in this case..
Thanks10% of .com used to be the rule of thumb, but that probably won't stick in the current climate.