Question about 8 and 7 Year Old Domains

Hi

Just a quick question for the guys who are active at Flippa or sell domains.

I am thinking about selling a number of my domains that I don't have time to promote or to recover rankings ! . Looking through my list I have 2 Domains that are 7 years old and one domain that is 8 years old.

The 7 year old domains are PR4 and PR2
The 8 Year Old Domain is PR2

Now the bad news....

I used these domains in the past to build adsense directory portal sites so obviously now they have no earnings ( Ah back in the day they done well enough ). And they look like crap.

They are all still indexed in google, one of them still gets a little traffic but let's assume no earnings for any of them.

I am not sure if I will sell them as I renew them every year purely because they remind me of when I was starting out and I keep telling myself I will try and make them decent sites !

If I was just selling the domains , a PR4 seven year old domain and two PR2 seven and eight year old domains, do you have any idea what these are currently going for ?

The niches are learning,travel and timeshare and all have two letters before each , all are .com

I know they are only worth what someone is willing to pay, just looking for an idea. I would only sell the domain names as it wouldn't be worth putting the content back on them.

I also know appraisal sites are a waste of time.

Thanks