it's impossible to say how much a blog is worth based on pr alone. You need to specify traffic volume and revenue as well to get a better answer.
Depends on the buyer Some buyer might be willing to pay lots of money if he or she really likes the blog and thinks it has potential
There is no straight forward answer to that. Perhaps the site has a custom design that is worth $500 or it is making $1000 a day in revenue. We can't tell this from the page rank.
PR1 shouldn't be worth much, unless you have proof of earnings from that site, then maybe 7 to 12 months earnings... Cheers
A rough estimate would be 12 months' revenue. Again there are loads of other factors :- 1.) Custom Design/Unique script license, as mentioned by Terminator. 2.) Domain age 3.) Quality of Links 4.) Time required to maintain it. 5.) Scope to progress further. 6.) Niche.
A PR1 site is usually valued at $5 per month. However, a higher Alexa rank and number of backlinks could make the site more valuable if you are going to sell links.
All I can add to this is the fact it depends on a buyer and intent. An "end-user" will want it for basically what it was designed for. If it has high traffic, then it has potential for a serious marketer. If it is link sales that interests a buyer, a PR1 isn't going to cut it.
Or a cup of goat milk ?! As many have said , you cannot give an exact value to a site just by its pagerank