Not much now. Keep it in a good place and in good shape in 30 years it will have value.
depends on who signed DH
The book is called where the sidewalk ends
There are many signed Harry Potter books on the market, many of which are on Ebay. Or you can try sending a letter to JK Rowling along with a payment for a book plus what you may think it would be worth to sign it.
nothing really but if it was signed by one of the characters it would be worth alot
Only a first edition copy of the book is worth any money. It can be sold for around £3000 - £4000, while signed copies will fetch more. Some signed, collectors editions can be fairly valuable if sold to the right person.
Not much, if it is in really good shape, it could be worth about $5 US. There are a few that have some real value. A US Early Reader's edition of Harry Potter and the Sorcerer's Stone is worth about $1,800.
i have no clue
If it is signed by him? Possibly a pretty penny. If it is not signed by him? Standard used book price.
Its worth as much as someone would pay for it.
The value would depend on several factors which are issue, condition of the book, and who signed it.
about 1000 there alot of money i have one it was 10,000 dollars signed by harry styles
$1000