LucoTF :
3000rs is just about enough for a used gt730 or r7 240, if OP can find a 750ti for that price he should snap it up.
Depending on the local prices, that is about $50 USD, it's a bit much for a used 730 or a 240 considering you can buy a new Radeon RX 460 for 70-80 with rebates and I have seen used RX 460 go for $50.
When the 750 Ti was coming to end of life, it was selling new with rebates for under $100, with a bit of bargaining and looking around it's possible to find a 750 Ti for $50.
Issue is local availability and pricing, many areas outside the US have very high hardware prices.