In Scotland the property market was completely shut down during covid and has only just re-opened. Estate agents here take no notice of early website hits because they know that every neighbour and friend is taking a peek.The only "interest" they register are from people who have formally told them, we're interested .
The Scottish property business works in a very different way from England and Wales. For a start every property is independently professionally surveyed and valued, and any interested party (including mortgage lenders) has free access to the full report. So
the market price is normally very close to the valuation . If several people express an interest, the selling agent will fix a closing date, at which all can submit a closed bid via their lawyer. Each bidder must be told how many "interested parties " there are and from that can guess how much competition there will be. In other words, an attractive property will almost always attract bids higher than the asking price. That's why the OP is thinking of offering more.
OP, as an experiuenced and successful buyer in Scotland I never tell anyone (especially the seller or their agent) what kind of bid I'm going to offer at closing date. Because if that gets about, some rival can outbid me by a trivial amount. Do tell the seller and their agent (and repeat it in the formal bid) anything that makes you a more attractive buyer ( cash buyer, no chain, willing to complete when it suits seller). What you need to do now, is be sure you have your lawyer and mortgage lender lined up, and ask the lawyer to formally notify your interest to the selling agent so that you can made a bid at closing date.
I'm not at all familiar with Thurso , but I take it you've checked out the selling prices of nearby properties here
www.rightmove.co.uk/house-prices/kw14/howburn-road.html
It looks as if they don't come on the market very often (a welcome sign of stability) and it's a nicelooking well presented house in (googlemaps) a well kept neighbourhood, handy for schools and open spaces.
Only you know how much you can afford and how badly you want that house/location. When I know there will be other bidders, my tactic to make my bid as generous as I feel comfortable with. And keep it between me and my lawyer until closing date. Resist any wheedling queries from the agent or seller because if you tell them "My bid is 90 K" they have an incentive to tell other interested parties to elicit higher bids than yours.
Good luck; and don't forget to ask the selling agent how many formal expressions of interest they have.
OP I take it you've seen the nearby selling prices here
www.rightmove.co.uk/house-prices/kw14/howburn-road.html