assuming mid or low end is like 80/ 100$, you can buy a viper mini and a drunkdeer g60 (80$) on their website.
If the budget is lower, you can find a decent keyboard on amazon, Try and avoid big companies there, the quality is lower imo
mouse i test about 5 chinese mouse,they all good,but for different size of hand,i don't wheather can you buy them,all wireless.mchose A5pro 30$,Inphic IN6 20$,Redrragon G49 18$,metaphyuni P1 promax,18$.rapoo VT1 Pro,35$.all 3395 sensor.