No idea whom he is. Get him to write a detailed bill of sale describing the cue, its condition and disclose any flaws that’s cosmetic or affected how it plays, ex., cue butt, shafts or assembled cue isn’t straight, cracked ferrule, etc.
That’s important because you was to repeat this in your message you send the seller paying for the purchase of goods.
Be sure he sends you a complete description of the cue in his Pay Pal invoice so you can get a refund if the cue is not as described. That’s why you need the seller to warrant the cue is straight and mention any nicks, dents, scuffs, chips, or any other flaws the cue could have. Nowadays you must be careful; if the seller hesitates, don’t buy the cue.