These days if they want to win the business they have to give you a fair price to start with or you will just laugh at them. As they are starting with a genuinely sensible price they don't have far to go with discounts. Perhaps if you are a large customer with a regular need they may give you a 5% discount, or if they are trying to move in and grab the contract from their competitors they might even take a bit of a loss for the long term benefit.
5%

Let's put it this way, if I buy for myself then 10% is what I usually accept because it's a single sale. If I buy for work (i.e. large orders) then the discounts are high. Like, a lot (I won't say how much). For 10% I wouldn't even lift a finger. And none of the test gear providers is making a loss in those deals.
However, that's for big brands only. B-brands work with much tighter margins and have less wiggle room for discounts. How much I don't know because I don't touch them.
If you are a small business or individual though you can forget it, your best bet is to trawl the internet for the best deal.
No, it's not, simply because test gear isn't like cell phones or flat screen TVs, prices are much more controlled. Pretty much everyone advertises list price or slightly below.
In general it's recommended to talk directly to the manufacturer and leave out resellers if possible. Generally T&M prices are negotiable (even individual sales), and I know it sounds harsh but only the lazy pay list price. What deal you get depends on how good you can haggle. 10% should be doable even for individuals, or paying for the basic variant and getting options on top of it. Sales droids are paid for selling, and the amount they sell counts towards their performance, so they're usually flexible. If not, hang up and call again until you get another droid.
Also ask for demo gear which usually is loaded, looks like new, comes with full warranty and is a lot cheaper than a "new" instrument.
Hi all, Back in the day, I recall TE distributors visiting the production supervisor in attempt to sell test equipment. There always seemed to be deals getting cut, etc. Sorta like buying a car if you will. Supervisor would say things like, if we add an extra meter how does that affect the price? Those kind of things.
Now when I contact these guys looking for a deal, I pretty much get quoted what is out on the website. I was looking to get a scope, and also a Bench multimeter, but no wink wink, nudge, nudge, Bobs your Uncle deals to be had.
So I ask ya, what is the secret to scoring a sweet deal when working with the distributor guys, or is it that I am just to small time to score a deal?
Sounds like Tek

They are pretty much the only big brand I found that is completely inflexible in pricing, and not just for small buys. They seem to give huge discounts to the edu market but that seems to be it. Not sure if that's a great loss, considering how bad their product portfolio is these days.
Otherwise it's difficult to say without knowing the circumstances (did you talk to the manufacturer or some resellers?) or which manufacturer is involved, but if you specifically mentioned your workplace there might be some understanding to only deal with certain individuals. In these settings, the personal relationship can play a huge part as well.
Still, you should be able to get a decent discount for a big-brand scope that isn't Tek if you do some legwork.