When you say well used older Colt, depends on what it actually is. Does it have a fixed carry handle or a flat top? Will you be adding optics or fine with a carry handle? There are many more options with a flat top.
I don't think the WW is that out of price. It's about $100 off of pre-panic pricing. Most reviews from owners are great regarding the WW so you can buy with confidence.
As others have said, you can't go wrong with a new Colt. However, if it's well used and not as configurable as you would like it to be, then I'd opt for the WW.