A dilemma...

I have quite a lot of things (these range from Artbooks, Material Books, Manga both Japanese and English, Tales of Series Doujinshi, some figurines, video games, Pokemon TCG cards, etc) that I no longer want and I want to sell them so that I can make more room for the stuff that I do want, but I have a huge problem...as most of you probably know, I live in Singapore, and I'm not sure which currency I should sell my stuff in. It will be easier for me to put a price if I priced it in my own currency, which is SGD, but USD is kind of a universal thing. There is also the issue of calculating the shipping price. It's easier for me to stick to SGD for that, as currency conversion, due to the changes in the exchange rate, sometimes people will end up paying more, sometimes paying less... Of course, with PayPal payment, you can choose the currency to pay in, which won't be a problem, but I also want to give some other payment methods, like for instance, via Western Union since it doesn't seem like it has a minimum amount of money you can send, which will be good for people that doesn't have PayPal (although you'll have to pay a small fee I think) and they also convert the currency for you. I want to avoid concealed cash though, but you'll have to go to a currency exchanger to change the money to SGD if you want to use that.

What do you guys think? It's either:
- USD for the price of my items with shipping cost in USD (Which will be the hardest option for me, since I'll have trouble putting a price tag on my items and I need to calculate the shipping cost into USD)
- USD for the price of my items with shipping cost in SGD (This is okay for me, but it will get hard for me to put a price tag on some of the items, but the shipping cost in SGD will make things easier and I can give an accurate amount)
- SGD for the price of my items with shipping cost in SGD (This is no doubt the easiest option for me since it's in my own currency)

I need some opinions?

Link to the currency converter I use