For comparison, a refurbished Dell Optiplex 9020 in Amazon costs $190 USD. Same i7-4790 and 16gb ram but with a bigger 480gb ssd (and a 90-day warranty by Amazon).

Msrp naman for a gtx 1650 is $149 new.

You're looking at 190 + 149 = $339. Apply mo na lang anywhere between 30-40% price reduction. So around $200-235 or Php 11k-13k siguro.