control boxes for submersible pumps

For fifty or so years I have taken care of the three wells on the property,..  They are typical (for this area)-- 100' deep, 4" diameter wells with 1 hp submersible pumps,  Every few years one or another of them gives me trouble.  It is often times the pressure switch (ants like to commit suicide on them) or else is a problem with the above-ground control box,...  bad capacitor or relay switch.   Anyway I generally have a spare control box on hand and replacing it usually fixes things.  Yesterday I had to do just that and thank God it fixed it...    I just went online to order a replacement control box to have on hand and was shocked at the prices ... the ones I would gett used to be around $50 for a control box but is now $150...   Then I saw that there actually is quite a range of different prices for different brand ones...  I saw that there is actually a Chinese made one for around $50 and it left me wondering whether it is an inferior product...   So my question is,..  what do other people do about these 1hp submersible control boxes... Has anyone had any success with the cheaper ones?  How different can a capacitor and a relay switch be?  or am I just wasting my money on them...  Thanks