Apple iPad 1st Generation retailer A1652

Product Name: Apple iPad 1st Generation retailer A1652
Not mine, won in a storage locker. Not a tech guy so here is what I know. Turns on and it's asking me to set it up or link to my device. I guess it's unlocked. Battery- overnight only got to 85% after work appx 10, device not touched it was at 69%. No cracks or chips, camera looks fine. 12.9 screen it's a big one. Glass dirty with brown stuff. Don't know how to clean it safely, sprayed eyeglass cleaner it took some off but smeared it a little. As-is sale. I see retailer refurbished ones go for 300 and up. I think 128GB????? Not sure.