Evidently both the Robertson pipes and the Piob Mhor lack hallmarks, thus are nickel-silver/German silver/cupro-nickel mounts. They're still nice hand-chased Dalman & Narborough work, but this will impact the final prices.

Here's a Lawrie set currently under $300. I'm huge Lawrie fan and the sets I've had like this had super stability and tone.

https://www.ebay.com/itm/17562620002...ndition=4%7C10