Stegsie
Head Pro
I think it all depends on what level you are at. What was your handicap when you stopped all those years ago and what do you think it roughly is now. If its total beginner level then a second hand set off the shelf is the way to get started. If your at a level where you have a decent swing and can hit a ball then I'd look to go get fitted out first and see what you need then look to second hand to try get them.
I am only off 24, so doubt I would see the benefit of a really decent set.
I'm back with the Pro this week, so will have another chat with him.
Cheers!