you can open namebio and search for this 2 words
Example: Domain is name pros in search of namebio add name and hit enter search for all name and take average price same thing for second word if name +word =sold for 3k and word+pros sold for 10k then add final price of you 2 words between 1k to 3k take less price or add it for make offer if domain is good you will recive offers from buyers i don't like GD appraisal this is tool man someone like me and you design it i don't believe in this anyway if i have a good 2 words have high search volume and GD appraisal says is for 500$ and i don't like this price I think he have much more of that if you take this domain for 5 or 10 years and get back to GD appraisal he will make it for 10 or 15k
finally, if you have a good 2 words search on namebio is an easy way to make a comparison
good luck for you