On receipt of your calipers I will strip & clean them thoroughly removing any corrosion and built-up fluid deposits - then replace all seals with good. Quality replacements & fit stainless steel bleed nipples to ensure ease of future maintenance. Badly pitted etc and you can decide whether or not.
Please note - I can't sort calipers with snapped bleed nipples, most other issues commonly affecting them are easily dealt with though. If in any doubt of the suitability of your calipers for rebuild then please message me with photos.
If you would prefer to drop/collect the calipers off to me in Reading this is also an option.