Currently my room has no treatment

and i am planning to do something on it . I found this add in olx offering bellow items(acoustic panels made of acoustic grade glass wool ) ,3 years old @ 18K.
A. 4" (inch) thick x 25" x 50" - 3 nos
B. 2" (inch) thick x 25" x 50" - 6 nos
C. 2" (inch) thick x 25" x 25" - 8 nos
Is the price reasonable? Material condition yet to confirm physically .
Or new DIY one will be better choice?
Can anybody share contact details near around Bangalore who can custom build the acoustic panels?
or is there anybody in same path of upgrade and ready for group buy ?
Waiting for your valuable response,

and i am planning to do something on it . I found this add in olx offering bellow items(acoustic panels made of acoustic grade glass wool ) ,3 years old @ 18K.
A. 4" (inch) thick x 25" x 50" - 3 nos
B. 2" (inch) thick x 25" x 50" - 6 nos
C. 2" (inch) thick x 25" x 25" - 8 nos
Is the price reasonable? Material condition yet to confirm physically .
Or new DIY one will be better choice?
Can anybody share contact details near around Bangalore who can custom build the acoustic panels?
or is there anybody in same path of upgrade and ready for group buy ?
Waiting for your valuable response,