Stuart has been running his business, which sells cars on behalf of their owners, for about 14 years and said the rise in car-based crime in recent times had become "a plague".
As well as losing wheels and having cars left with substantial damage he has also seen a rise in fuel thefts as the cost of petrol goes up.
"They stab holes in the petrol tanks to get it out."
It was the equally rising costs of insurance excesses which had also hit home. Some on-behalf cars were not fully insured but he felt obliged to cover the damage costs for the owners because they had been left with him.
However, he and other recently targeted dealers did have some cause for celebration. Last Thursday Stuart installed motion-sensor cameras and on Sunday morning they came up with a result.
He had previously had CCTV on site but said all he would often be left with the morning after a strike was simply a photo of offenders in the darkness who were unlikely to be identified.
But about 4am on Sunday the sensor camera sent an immediate signal and images to him.
"About four minutes later we were at the yard and only a couple of minutes behind us were the police — they got the guy while he was still in the yard so at least that's one of them out of commission for now."
They recovered several wheels and a man was arrested.
They also found bricks (for placing under jacked-up cars) and jacks and tools in his car.
"So he came prepared — they know what they're doing these guys."
But again, it was the damage which had been caused to several vehicles which hit Stuart in the pocket.
For Turner Cars Napier manager Sean Butcher it has also been a bad run, with three wheel-targeting incidents emerging over three months.
"It's the mags they're after, not the tyres, and to me it looks like they are taking them to order," he said.
As well as taking multiple sets of mags the thieves also stole one of the cars to take them away in.
Like Stuart, Butcher said it was the damage the thieves did which was the big cost and he reckoned the insurance excess costs had gone into five figures.
The offenders would break into the boot and take out the spare wheel and jacking equipment.
The spare was used to help keep one side of the car up as wheels were removed.
"And sometimes they just drop the cars back down on the ground — it's the damage."
One of the stolen cars was later found with the fuel tank punctured and with other damage was later written off.
Since those incidents the business had shifted its site, and that - along with multiple lighting cameras - had seen a halt in the strikes.
Stuart's description of the theft of mag wheels being at "plague proportions" was effectively backed up by Constable Mike Burne, who has encountered a string of such theft reports since the start of the year.
There had been more than 40.
Apart from Mega Save and Turners, automotive yards in Cadbury St, Leyland St, Hyderabad Rd and Stortford Lodge had also been hit.
Police urged anyone seeing or hearing anything suspicious around car yards to call them immediately.
Burne said the trend of radar-detection system thefts was, like the wheels, also continuing.
About 40 systems had been reported stolen from cars across the region since the start of the year - and in one of the latest incidents the thieves were not concerned about making a mess or a noise.
Nor, it seems, about the prospect of being spotted, because it happened between 6.30am and 1.15pm.
The vehicle had been left parked up on Bridge St and the thieves smashed a passenger window to get in.
They also came across the owner's wallet which had been left in the car and took that, as well as the radar detector.
