So your looking to build a low end computer. Something under 150 €/$/£ Well then here's what I recommend.

• CPU: I7 2600/3770 or Xeon 1230- V1/2

i7 2600s

These CPUs make for an exceptional performer. While power consumption is much to be desired. They tend to be quite powerful and found quite cheap.i think these are still decent budget offerings

• MB

• The mucai h61 is a pretty decent MB. Extremely cheap can be picked up for as little as £13 on alliexpress I can speak from experience having used my h61 for 7 months now

Mucai board AliExpress

• Intels own brand of MB can tend to be quite cheap and can be picked for as little as £15. Do research into the model of intel MB you'll be getting as these tend to be quite finicky from what I hear.

intel board

• GPUS

• I personally recommend the gtx 700 series 760s in particular can be picked up for as little as £18 and they're decent performers

Gtx 760 ebay

• If you've got a bit more to spend. I advice you go for the AMD Rx 480/570 or perhaps do what I did and save. I managed to get a gtx 980ti for a whopping £20.
• PSUS
• You should never cheap out on your PSU. Get a cheap name brand if possible. I recommend checking for old stock. And display items it's how I landed a Corsair CX550.for a whopping £27.58.