113" what? Here in the USA, I can have a Chevy for under $1,000... But, the year, make, model, mileage, etc. actually describe the car.
If it is a manual retractable screen for $500 you are paying to much.
If it's a non-velvet lined fixed frame screen, then it is, MAYBE, about average, but not something I would buy, or recommend.
If it is their Plano Velvet 113" 16:9 screen, then it is worth a try.
I've never heard of them, but most mid-level screens like this (Vutec/Carada for example) would be made in the USA and shipped locally to maintain quality.