Hi Karoi
I have sold all my coins,1oz,2oz,10oz,1kg,bullion or proof etc.
If you have a time to deal, search, list, answer tons of questions numismatics for you.
If you are working full time in non pm's job and want to invest on silver as a stacker bullion is the way to go as many will agree.
From time to time its not gonna hurt to grab a bargain high premium coin or bar at very attractive/bargain prices as you can always sell it at least for low loss but most break even and make profit.
Coins also differ, lunars are very profitable vs non lunars and mostly recognised coins are way to go if you want to pay high premiums, such as Perth Mint coins. Having said that new 2016 Kangaroo coins can be milked I heard from a reputable member but I havent seen them in person yet to confirm. Many trade here will tell you which ones to avoid if you arent fan of milking spots. Spots on coins = lower the premium = usually less people willing to buy at retail or near retail price. If you buy at spot you can always sell at spot to + (+$2 to + $3,4,5) per coin.
Coins are a bit trouble to handle for me, some with capsules have markings on capsules, cracks etc so price will drop instantly.
Postage also harder as you need to wrap and really take care when handling them.
People go crazy as not to touch them bare handed as it ll drop the value as bars not concerned being touched as much as coins get upset.
If I buy in the future its going to be only in boxes 100,200,250,300 oz to keep them in perfect condition and not worry them being cracked/capsules.
Premium on coins isnt a bad thing as you pay and get the premium back when you sell. Providing not selling in hurry.
Also if you can buy more coins say 100 in one go your per coin cost will drop nearly $2 coin which will save you $200 + when you buy.
If you can hold on to them and sell later you can make profit.
One more point to consider coin prices isnt changing as volatile as bar prices when spot moves but bar price will go up and down asap. If prices drop further its better to have coins but if prices go higher to AUD25 to 30 oz its better to have bars ??? I think...
It all depends your plans short and long, buying power, tolerance levels of spot dropping, how many years you will be stacking/collecting, where will you keep your silver/gold, where will you sell, do you have any goals and does your strategy support your goal?
All the best