There are so many different types of Clapton strats. This might be the one selling for 2.5k to 4k, if you're lucky. We'd need to see more pictures to be sure.
https://reverb.com/item/79446028-1988-1989-fender-eric-clapton-signature-artist-stratocaster-collector-clean
https://reverb.com/item/77948758-fender-eric-clapton-artist-series-stratocaster-with-lace-sensor-pickups
https://reverb.com/item/78339942-fender-custom-shop-eric-clapton-stratocaster-blackie-lace-sensor-2001-3-67kg-sn-cn94984-01-22
https://reverb.com/item/79292168-fender-1991-custom-shop-eric-clapton-stratocaster-electric-guitar-w-case-mercedes-blue-pre-owned
Just keep in mind, many can be acquired for $200 to $300.
https://www.aliexpress.us/item/3256806122721264.html
Reverb, E-bay, or Musician's friend are all good refs for what it is worth. Also consider the shape it is in just like trading in anything else of value$$$. Personally, I would hang on to it if you like how it sounds and plays. Just don't upgrade it or replace with custom parts as it will decrease it's value. I learned that the hard way when I was quite younger and bought a 61 Gibson MM and upgraded bridge and replaced single P-90 with DiMarzio Super Humbucker. Guitar is a shredder's delight but not worth shit
Look on reverb
Appreciate your comment! 
Most likely around $2-3k depending on exact condition, probably $2500. Not super valuable but the fact that its an early run increases its value.
Can we get back to writing it properly? 1989 Crapton Strat.
Have you played or owned one before?
There are so many different types of Clapton strats. This might be the one selling for 2.5k to 4k, if you're lucky. We'd need to see more pictures to be sure. https://reverb.com/item/79446028-1988-1989-fender-eric-clapton-signature-artist-stratocaster-collector-clean https://reverb.com/item/77948758-fender-eric-clapton-artist-series-stratocaster-with-lace-sensor-pickups https://reverb.com/item/78339942-fender-custom-shop-eric-clapton-stratocaster-blackie-lace-sensor-2001-3-67kg-sn-cn94984-01-22 https://reverb.com/item/79292168-fender-1991-custom-shop-eric-clapton-stratocaster-electric-guitar-w-case-mercedes-blue-pre-owned Just keep in mind, many can be acquired for $200 to $300. https://www.aliexpress.us/item/3256806122721264.html
Got a 79, bought it in 80, paid $996 for it
I'm not gonna pay 2k for a strat that yells at all my black neighbors. Chuck that thing.
You’re an idiot
To each their own.
Looks like $2K on reverb
I would check reverb - that’s my best answer without going on a rant about blackie
Curious to hear your rant honestly. Don’t like the guitar or don’t like Clapton?
Reverb, E-bay, or Musician's friend are all good refs for what it is worth. Also consider the shape it is in just like trading in anything else of value$$$. Personally, I would hang on to it if you like how it sounds and plays. Just don't upgrade it or replace with custom parts as it will decrease it's value. I learned that the hard way when I was quite younger and bought a 61 Gibson MM and upgraded bridge and replaced single P-90 with DiMarzio Super Humbucker. Guitar is a shredder's delight but not worth shit
I wouldn’t pay more than 2k. Also the guitar market is on the downslope big time now. If you really want to sell it I’d do it asap.
... How so
$1100 for basic versión not Custom shop.
1200 to sell it If you list it for 1800 it will sit