Most folks average less than 2 SP a week per 1000 vested SP. A select bunch (heading trails etc) will make 3/4 SP per 1000 vested.

For me, without running a bid-bot or getting involved with the self-vote crew, you will have to go some to get an ROI on investment.

However, if you are selling out / sold out then yes, from your side the price needs to go up! :)