I carry out pre-purchase inspections when you are looking to purchase a 2nd hand piano, especially on places such as eBay as you can be taking a huge gamble.
If you are new to pianos, there can be a lot that can be wrong with pianos such as loose pins,action worn out, cracked iron frame, which is a huge expense to try and rectify.
Simple inspection will save you spending a huge amount of money going to waist when you don't have to.
I do carry out running repairs such as string replacement and sticking keys, for any anything more extensive such as servicing grand pianos and other major repairs, I have many friends and colleagues
I can recommend for that kind of work.