Daion Guitar

I got an old guitar.

To be precise, its a Daion quality guitar Model DA-71 EC.
I have no idea where its made, but inside the sound hole the stickers mention - Made for Central Musical Instrument Australia. It looks like an old guitar, probably in the 1980s circa and should be consider a classic vintage(?) Anyone out there know how much this guitar is worth?

Please do help out as I have no idea, as I am new this guitar world.

Here's a photo of a Daion guitar (handcrafted guitar), not my model but it looks similar in lighter colour. Personally I think the Daion logo is a classic as it looks like a tuning fork or a goat's horn, that's if have wild imagination like me :)
I am a non musical person but ever since I got this guitar, I am addicted to it. As I just love how the guitar sounded as it can be so calming and soothing.

And with help from friends, book and online internet guitar lesson, I managed to learn some guitar basic and have been plucking and strumming away for many late nights, to much of my neighbor annoyance I bet. As the result my left fingers also suffered; they are still sore from the countless hours fret pressing. Any cure for this beside stop practicing? :)

I know (and hopefully) its going to be worth while as I am beginning to hear the results.

And most importantly, I hope this will cure my much debated so call tone deafness and 'miraculously' add a little music to my life.