Value of mint condition first pressing of Sgt. Pepper?


I have a mint condition first pressing (I think) copy of Sgt. Pepper's Lonely Hearts Club Band.  Vinyl is shiny and plays flawlessly, jacket is shiny with few indentations, and insert looks like new.  Any idea how much it might be worth.  Also, any idea as to how much value something like this gains over the years?  I'm thinking of giving it to my granddaughter (age 4) for her to cash in when she graduates high school.
Any input will be greatly valued.Russ
rustler
Take a look at popsike.com for actual prices fetched at auction. Is it the UK mono first pressing? This one sold for about $1,900 in 2014.

https://www.popsike.com/The-Beatles-Sgt-Peppers-NEAR-MINT-UK-1967-1st-Press-MONO-Press-LP/261516431365.html

You really need to be certain of pressing and condition.
Rule of thumb - if it looks like it hasn’t been played it’s probably not the 1st Pressing 😀
Look up the information in the matrix/runout area on Discogs to see what version you have, using the "find your version" tool.  Once you've done that, search the marketplace to see what other people think they are worth.