Rolex Two Tone late 70s Thunderbird

[dnhphotography]

Would like to get some opinions. I recently have been given an offer to buy a two tone Rolex Thunderbird made during my birth year. No box, papers or bracelet. It has the 1570 movement, 14k gold unidirectional bezel and stainless steel 36mm case. It is in excellent condition including bezel and has been serviced recently. The dial is gold tone.

The seller is asking $3,500. I never thought about a two tone until now. Being made in my birth year makes it extremely tempting. I have been shopping for a Rolex to be worn in casual and formal attire (sporty but also dressy). I really like the added bonus of the unidirectional bezel with date as it would be an extra function for a watch at this price point. Should I pull the trigger or keep shopping around? 36-39mm case sizes look perfect on my 7 inch wrist.

Thanks for any opinions.