Not been to a wedding in years, so not sure of done thing now.
Bride is an old school friend (we're in our 50s). We chat fairly frequently and try to see each other at least once a year, but we live a fair way apart and have our own families and lives and are obviously not as close as we used to be.
It's a second marriage (if that matters) for both of them. Wedding invite does the thing of saying they don't expect presents but would prefer cash if we do want to give something (it says it more politely than that)
I appreciate it will vary but ballpark figure of how much you'd give?