Nowadays in the ever-volatile world market, it's not really beneficial to directly convert a price of a tool, vehicle, or other purchase using exchange rates, especially if VAT is included in the conversion price.
To wit, the TSC 55 Body Only is 490 GBP or 408 GBP exc VAT. Directly converted, that's around $604 or $503 USD. The FUSA price for the TSC 55 Basic is $549 USD.
The exc VAT is only 1811 GBP, which drops the USD to $2233 USD, so I would imagine the US price would be somewhere between $2200 and $2600, maybe in the $2449 USD range. That's for the 'Plus' version, which includes the batteries and charger but not the underframe. The 'Basic-Set' version is 1833/2200 GBP Exc/Inc VAT, which includes the underframe but no batteries or charger.
The full set with underframe and batteries and charger is 2111/2534 GBP E/I, which would mean a USD price between $2600 and $3125, likely around $2849 USD.
As with most things, if and when this comes to the US, we likely won't have the same number of variants as Europe, and certainly not any "Free T 18 with purchase" deals.