All models Undersealing

Got the GR86 back from J R Classics https://www.jrclassics.co.uk/ (near Doncaster) today after having it undersealed. I wanted to keep it looking as standard as possible so they used Dinitrol 4010 along with ML cavity wax. Joe did a great job, I would defiantly recommend (y)
They aren't far from me. Would you mind sharing what the cost was for that (fully understand if you'd rather not).