Re: Military Intelligence
This is naive and based entirely on the Anonymous Coward's ignorance.
What we've been told is that it's a "small drone". In fact, reading the MOD's press release, we know it's a "small hostile drone", which means that they're using the word "small" as descriptive rather than as a categorization (a "small UAV" will have a take-off weight of up to 20lbs or 25Kgs, depending on which classification system you're using).
If the vehicle was a "small UAV", that puts it in the same class as the US RQ-7 and RQ-11. An RQ-7 costs about $750,000(!), while the RQ-11 Raven comes in at $35K -- but that's with the handy 10,000 unit+ price break. One has to consider whether someone only building/buying, say, a few hundred units would pay closer to the price of the RQ-7 or to the mass-produced RQ-11.
So, no, not "two orders of magnitude", and not $100.
But more likely the phrase "small hostile drone" is being used to embellish the RAF crew's skill in shooting the thing down. It's small compared to, say, a Typhoon.
Now, chances are extremely high that a UAV operating in Syria has Iranian origins. And the Iranians have a thing called a "Shahed 129", which is basically much the same as an MQ-1 Predator, even down to weapons capability. Pred's cost about $4,000,000 each. Maybe the Shahed-129 is less spiffy and costs, what, a tenth of that? That's a $400,000 vehicle (i.e. twice the cost of the missile).
(Why might this be a Shahed-129? Well, during June 2017, two Shahed-129's were shot down by US F-15Es near al Tanf on two occasions. So it's not a stretch to presume that a "small hostile drone" shot down near al Tanf might be related to the small hostile drones previously shot down near al Tanf.)