Investors looking for a high income stream often balk at closed-end funds (CEFs) because of their higher fees.CEFs' average annual fees sit at 1.09% (or $109 for every $10,000 invested), according to CEF Insider data, though it's not unusual to see fees in the 3%-4% range. While it's not a perfect comparison, Morningstar data shows that the asset-weighted average fee for mutual funds and exchange-traded funds (ETFs) in 2018 was just 0.48%. And many ETFs are far cheaper than that - SoFi even launched a pair of "zero-fee" funds in April.Fees matter because they directly impact returns. "The higher the fee, the higher the hurdle for the ETF or mutual fund to keep up with their respective benchmark," says Brian Parker, co-founder and managing director of EP Wealth Advisors in Torrance, California. Fail to keep up with that benchmark, and investors lose. High-cost funds can cost investors literally tens of thousands of dollars not just in the returns themselves, but opportunity cost (you have less money to reinvest and grow over time).However, it occasionally pays to pay more. CEFs, for instance, deliver sky-high yields several times more than the average ETF yield - a boon for income investors who simply want to sit and collect checks over a long period of time rather than sell off assets to register returns. At the same time, you don't need to tolerate absurdly high fees, especially from funds that don't perform.With that in mind, here are seven cheap CEFs to buy. Each closed-end fund boasts annual expenses below the CEF average. SEE ALSO: The 10 Best Closed-End Funds (CEFs) for 2019

Today, BlackRock Resources & Commodities Strategy Trust (NYSE: BCX), BlackRock Enhanced Equity Dividend Trust (NYSE: BDJ), BlackRock Energy and Resources Trust (NYSE: BGR), BlackRock Enhanced International Dividend Trust (NYSE: BGY), BlackRock Health Sciences Trust (NYSE: BME), BlackRock Health Sciences Trust II (NYSE: BMEZ), BlackRock Enhanced Global Dividend Trust (NYSE: BOE), BlackRock Utilities, Infrastructure & Power Opportunities Trust (NYSE: BUI), BlackRock Enhanced Capital and Income Fund, Inc. (NYSE: CII), BlackRock Science and Technology Trust (NYSE: BST), BlackRock Science and Technology Trust II (NYSE: BSTZ), BlackRock Enhanced Government Fund, Inc. (NYSE: EGF) , BlackRock Debt Strategies Fund, Inc. (NYSE: DSU), BlackRock Floating Rate Income Strategies Fund, Inc. (NYSE: FRA), BlackRock Floating Rate Income Trust (NYSE: BGT), BlackRock Corporate High Yield Fund, Inc. (NYSE: HYT), BlackRock Credit Allocation Income Trust (NYSE: BTZ), BlackRock Limited Duration Income Trust (NYSE: BLW), BlackRock Core Bond Trust (NYSE: BHK), and BlackRock Multi-Sector Income Trust (NYSE: BIT) (collectively, the "Funds") paid the following distributions per share: