The 8 stitch ringwork & 5/16x14 joint would suggest that this cue was built in the mid 80's, 1983-1986.
Richard was using a 5/16x18 piloted joint in 1982, & had started using the silver ring work by late 1986, early 1987. It is similar to his "After Six" model, but slightly different. Also don't see too many of his cues with 5 veneers, they usually have 4. This was definitely a special order cue.
Nice looking cue at a nice price, good luck with the sale!