This is a 90mm Maksutov labelled "Maksutov since 1943". I'm not sure of its origin but it looks like a "Skywatcher Maksutov telescope MC 90/1250 Heritage OTA". I bought it via Ice in Space Classifieds in 2019 and have made two modifications: i) fitted an extended dovetail mount followed by professional recollimation, ii) added a thin plastic tape shim under the back of the red dot finder mounting plate to bring the RDF alignment into the centre of its vertical adjustment range.
The price, including the OTA, red dot finder, diagonal and 20mm Plossl eyepiece as shown is $150 (about half the price of a new unit). This excludes postage and packing, I'd rather not post the telescope to avoid damage though it can be posted if necessary. Payment can be through EFT to my BSB account. I'm located in Lindfield, Sydney if you prefer to pick it up. Please contact me using the forum's private messaging.
No rush. I can put it on pending and hold it for you so you can come over and check it out at your leisure. Worth noting that the scope doesn't come with a tripod or mount so could you let me know if that is an issue before I move the sale to pending?